Diff: TinyResolver.h

Revision:

0:477d4e2f281a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TinyResolver.h	Thu Jul 21 16:53:11 2011 +0000
@@ -0,0 +1,65 @@
+/*
+ * mbed Tiny DNS Resolver
+ * Copyright (c) 2011 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+/** @file
+ * @brief Tiny DNS Resolver
+ */
+
+#ifndef TinyResolver_h
+#define TinyResolver_h
+
+#include <inttypes.h>
+
+#define DEBUG
+
+#define DNS_PORT 53
+#define DNS_SRC_PORT 1234
+#define DNS_TIMEOUT 15000 // ms
+
+// dns
+#define DNS_QUERY_A 1
+#define DNS_QUERY_NS 2
+#define DNS_QUERY_CNAME 5
+#define DNS_QUERY_PTR 12
+#define DNS_QUERY_MX 15
+#define DNS_QUERY_AAAA 28
+#define DNS_QUERY_ANY 255
+#define DNS_CLASS_IN 1
+
+struct DnsHeader {
+        uint16_t id; 
+        uint16_t flags; 
+        uint16_t questions; 
+        uint16_t answers; 
+        uint16_t authorities; 
+        uint16_t additional; 
+};
+
+struct DnsQuestionEnd { 
+        uint16_t type; 
+        uint16_t clas; 
+};
+
+struct DnsAnswer {
+        uint16_t name; 
+        uint16_t type; 
+        uint16_t clas; 
+        uint32_t ttl; 
+        uint16_t length; 
+} __attribute__((packed)); 
+
+int createDnsRequest (char *name, char *buf);
+int getDnsResponse (const char *buf, int len, uint32_t *addr);
+
+/** resolv host by name
+ * @param nameserver DNS server
+ * @param name hostname
+ * @param addr IP address (return)
+ * @return 0:success, -1:failue
+ */
+int getHostByName (IpAddr nameserver, const char *name, uint32_t *addr);
+
+#endif
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